Fastening device



April 16, 1946 R. A. HUARTMAN 2,398,374

FASTENING DEVICE Filed Jan. 8, 1945 lIN V EN TOR.

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7PM/mea /Z//Akfmw Patented Apr. 1.6, 1946 PATE . amsn- Nr-*oFFicE l rasranmdtvlca Richard A. Hartman, Cleveland, Ohio, assigner to Tinnerman Producti, Inc., Cleveland, 0h10, a

corporation of Ohio Application :mnu-yrs, isis, serial No. 511,188 1o claim. (ci. as-ssi This invention relates to ajfastening device comprising a washer-like member having thread engaging means, adapted to coact with'the thread of a bolt passing through a support, and having means to engage such support to prevent the rotation of the member.

The self-locking nut provided by this invention is especially adapted for mounting on a support Y' of wood or other material in which projecting portions of the device may readily embed them` selves, and it is an object of the invention .to

provide a very simple washer-like self-locking V poses. Another object of the invention is to pro- -vide a thread-engaging, washer which maybe readily mounted ona counterbored opening in the support and coaet with the wall of such opening thread engaging fastener for this or similar purto prevent rotation of the fastener las the bolt is turned into it. A further'object of the invention is to provide a thread-engaging washer which may .be easily positioned at the top of a. counterbore to be drawn into the counterbore by a bolt and which washer will be arranged to coact with the wall of the counterbore as it is forced therein in Y fastener and I have shown at B a plate to be such manner as to center the washer and to prevent it from tilting and to 'prevent the washer from leither tilting -or rotating when a bolt vis turned into it.

My self-locking washer is illustrated the' drawing hereof and hereinafter more fully described, and the essential'novel characteristics i are set out in the claims.

In the drawing, Fig. 1 is a top perspective of my fastening device; Eig. `2 is a bottom perspective thereof Fig. 3 is a plan on a smaller scale thread. Thus, portion of a fastener acts as a n ut for a bolt passing through the opening Il. I At the margin 'of the disc-like member I form arcuate tongues I5 which'are partially severed from the member, as shown, and bent upwardly 'at acute anglesthereto,V each arcuate member having a portion I0 projecting outwardly beyond tliegeneral contour of the member. A s shown in ,the drawing there are four of these arcuate tongues,- though the number may be varied if desired. They are preferably equi-distant and all extend in the same circumferential direction from their regions of anchorage to the body of the fastener.

The. periphery of thedisc-like member is also provided with upstanding arcuate lips Il 4which are bent upwardly 'at right angles from the body of the member. As illustrated in the ldrawing there 'are four of these lips, though the number may be varied if desired. The lips Il are prefer- -ably equi-distant from each other and are disposedb'etween the tongues ltrA of the fastening device in position ina'recess in the support; Fig. 4 is a crosssection illustrating the fastening device positioned in the support prior tothe insertion of a bolt therein, the plane of the section being substantially the same as that of Fig. 5; Figs. 5 and 6 are cross sections showing the mounted fastening device, these sections be-` ing taken onthe correspondingly numbered lines` on Fig. 3.

The fastening device, as shown in the drawing comprises a disc-'like member l0 of resilient .sheet material preferably sprlngsteel', having a central bolt opening il. The material of the fastener is,

deformed about this opening to provide a -thread engager. 'I'his deformation comprises, in the form shown,a pair of tongues l2 which are parand oppositely warped to denne a turn of a helical Il of the body of the fastener. In mounting, the fastener in a counterbore one rangs. 3. 4, 5 and s, I have indicated at A a wooden support adapted to receive and carry the Vclamped, to such support by a threaded bolt C passing through the plate and support into the fastener.. Azcounterbore'd or cylindrical well a is formed lin the support,l the diameter of which is only slightly longer than that of the diameter merely places a fastener over the well of the counterbore as indicated in Fig. 4. The fastener is then forced'axially into the counterbore with a suitable tool such as indicatedl by the dotted lines D in Fig.' '4, until the body of the fastener is seated on the base of thecounterbore. As the fastener is forced into the well the arcuate tongues I6 score the wall of the well, as indicated at a' in Fig. 3, so that .from the start the fastener Y' Vfirmly attaches itself to the support. When the fastener has been seated inthe well it is twisted slightly by the tool 4which engages the side walls of the tongues l2.'

The upstanding lips il which rise from'the body of the fastener. n1; the unterbore with Vreasonable snugness and therefore center the fastener with the bolt opening a--2 and prevent r 'tilting of the fastener while itis being forced into the coun'terbore.

' By carrying theV Projections il on the endsof the yielding tongues il, I also providesl certain amount of latitude in the engagement of the projections on the'tongues with the -wall of the support. The tongues may play back or up tions IS prevent turning of thefastener and the guide lipsfjIB prevent'tilting of the-fastener whilethe bolt is being tightened.

The fastener may be very cheaply constructedl j and it has been found to be very effective forfthe purpose intended, acting as a nut for the bolt" without the necessity of employingnywrench or other external means to holdthe fastener.

I- claim:

tongues at the margin of the fastener partially severed therefrom and extending in the same general circumferential direction and each inclined at an acute angle to such body, the free ends of the tongues being formed Ito project outwardly beyond the general periphery of the fastener.

6. A fastening device comprising a resilient sheet metal member having a bolt opening. and carryinganinternal threadfengager about the opening and tongues at -themargin of the member inclined in the same circular direction as the .internal edgev of the thread-engager and extendding outwardly beyond the general perimeter of *the member. t

7.y Apfastening device comprising a disc of resillent material having a central bolt opening and 1. A fastener in the form ofa substantially ycir n cular plate having an opening and"carryin`ga thread-engager about the opening, the marginqof the plate being formed with a partially severed" arcuate tongue etxending peripherally and"`hav` ing an outward portion adaptedr to xs eat'in the wall of a counterbore in asupportfor the fastener. f 'l 2. Afastening device comprising' a `member of resilient sheet material having a bolt opening,

. material of the fastenerabout the opening being deformed to provide a threadfengager, and

'tongues at the margin of the memberpartially severed'therefrom' and having their" majo'i` por-` tions. within the perimeterof` thev member and having comparatively short; projections adjacent their freeends extending beyond' the general perimeter of the member.

3. A fastening device comprising a 4disc-like member of resilient sheet material having acentral bolt opening, the material of the fastener being deformed about the opening to provide a thread-engageizfand.v a lpluralityA of arcuate tongues at the 'margin Aof 1the fastener, said tongues being partially-severed from'the body of the fastener and anchored thereto at one end, the tonguesy being -inclined from their region' of anchorage and at their free ends havingoutward projectingportions, 'I

4.,A fastening vdevice comprising a disc-like member of resilientsheet material having for the most part a circular periphery and having a central bolt opening, the material of the fastener about'the opening being deformed to form a thread-engager for a bolt passing through the opening, and. a plurality of arcuate tongues at the margin of the fastener partially severed therefrom and extending in circumferential direction, the free ends of the tongues projecting outwardly beyond the general periphery of the fastener.

5. A fastening device comprising a disc-like member of resilient sheet material having for they most part a circular periphery, and having a central bolt opening, the material of the fastener about the opening being deformed to form a thread-engager for a bolt passing through the opening, a. plurality of equi-distant arcuate margin extending"-outwardly beyond the general periphery Aof the disc and inclining from the body of the discin lthe same circular direction as the deformed'- internal thread-engager.

BIA fastening device comprising a plate-like member having a bolt opening and deformed upwardly about the opening to provide threadengaging means, the fastener having within its margin a relatively movable tongue carrying a projection extending' outwardly beyond the general perimeter of they fastener, said fastener having also at its margin an* upwardly .extending guiding portion.

, 9. A fastenerI in the form of a plate having a central opening and carrying a thread-engager about the opening, the margin of the plate being formed with a plurality `of partially severed arcuate tongues each having an outward portion. the marginvalso being .arcuately flanged between said tongues out of the general plane of-said plate. a

', 10. A fastening device comprising a-substantially-circular membenof resilient sheet material having a central bolt opening, a pair of opposed integral tongues partially severed from the body of-the fastener,.being anchored thereto at their distant ends and bent upwardly at; opposite acute angles and warped in opposite direction to provide a helical turn making a thread-engager, a plurality ofarcuater tongues at the margin of the fastener, said arcuate tongues being partially severed from the body of the fastener and anchored thereto at one end, the tongues being inclinedfrom their regionv of anchorage in the same arcuate direction as the warping of said opposed tongues and at their free ends having comparatively short outward projecting portions, and a plurality of arcuateedge flanges interspersed with the arcuate tongues and extending' upwardly substantially normal to the general plane of said circular memberthe outer surface of said edge flanges defining a. circle of less diameter than the circle defined by the outer edges of said projecting portions.

, RICHARD A'. HARTMAN. 

